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708
T
here is a wealth of literature highlighting the
negative physical (eg, type II diabetes, car-
diovascular problems) and psychosocial (eg,
depression, low self-worth) consequences of ado-
lescent obesity.1-3 However, less attention has been
given to the role adolescent weight status plays in
future health-risk behaviors, such as problematic
substance use. With adolescent overweight and
obesity rates remaining high (33.6% overweight,
18.4% obese 12-19 years),4 and substance use
more prevalent in young adulthood than any other
developmental period,5 identification of adolescent
weight status as a predictor of future problematic
substance use behavior is likely to have a signifi-
cant impact on research and clinical work aimed to
reduce multiple health risks in the transition from
adolescence to adulthood.
Adolescence is a crucial period for prevention ef-
forts aimed to reduce problematic substance use in
young adulthood. According to the National Survey
of Drug Use and Health,5 young adults have the
highest rates of current tobacco use (39.5% overall
including 33.5% cigarette use) and illicit drug use
(21.4%), with 19.0% using marijuana in the past
month. Binge drinking has been reported for 39.8%
and heavy alcohol use for 12.1% of 18- to 25-year-
olds. In the past 30 years, many epidemiological
longitudinal studies have identified several key
risk factors for problematic substance use, includ-
ing regular cigarette smoking, binge drinking, and
marijuana use, in adolescence and young adult-
hood. Temperament,6 behavioral disinhibition,7 ex-
ternalizing behaviors,8 poor parental monitoring,9
lack of parental support,10 negative peer interac-
tions,11 and affiliation with deviant peers12 have
been well-established as critical factors involved in
the development of problematic substance use.13-15
Considering the array of risk factors in adolescence
contributing to future problematic substance use,
it is likely that other health-risk conditions, such
as overweight or obesity status, are linked to prob-
lematic substance use behavior.
Little is currently known about the relationship
between adolescent weight status and future prob-
lematic substance use; however, use of an adoles-
cent developmental framework is likely to increase
our understanding of why this relationship may be
a significant one to address. One explanation may
be that a shared underlying factor like impulsivity
may explain co-occurring obesity and problematic
substance use. As children learn to self-regulate
behaviors, those who have difficulties with self-
control are more likely to over-consume energy-
dense food contributing to obesity risk16,17 and en-
gage in antisocial behaviors leading to substance
abuse and dependence.18,19 Although a shared
underlying factor explanation is plausible, under-
standing adolescent behavior without considering
the social context is incomplete.
H. Isabella Lanza, Research Associate and Christine E. Grel-
la, Professor-in-Residence, Semel Institute for Neuroscience
and Human Behavior, University of California, Los Angeles.
Paul J. Chung, Associate Professor, Department of Pediatrics,
University of California, Los Angeles.
Correspondence Dr Lanza: [email protected]
Does Adolescent Weight Status Predict
Problematic Substance Use Patterns?
H. Isabella Lanza, PhD; Christine E. Grella, PhD; Paul J.
Chung, MD
Objectives: To identify underlying pat-
terns of cigarette smoking, alcohol use,
and marijuana use in young adulthood,
and ascertain whether adolescent over-
weight or obesity status predicts prob-
lematic substance use patterns. Methods:
The study included 15,119 participants
from the National Longitudinal Study of
Adolescent Health (Add Health) at Wave
1 (11-19 years) and Wave 3 (18-26 years).
Latent class analysis was conducted. Re-
sults: Participants were classified into a
Low Substance Use (35%), Regular Smok-
ers (12%), High-risk Alcohol use (33%),
or High Substance Use (20%) class. Over-
weight/obese adolescents had a greater
likelihood of belonging to the Regular
Smokers class. Conclusions: Overweight/
obese adolescents are at higher risk of en-
gaging in regular cigarette smoking with-
out problematic alcohol or marijuana use.
Key words: adolescence, alcohol, ciga-
rette smoking, marijuana, obesity, young
adulthood
Am J Health Behav. 2014;38(5):708-716
DOI: http://dx.doi.org/10.5993/AJHB.38.5.8
Lanza et al
Am J Health Behav.™ 2014;38(5):708-716 709 DOI:
http://dx.doi.org/10.5993/AJHB.38.5.8
Critical to the discussion on risk-taking behav-
iors is the knowledge that social standing among
peers is a prominent goal for most adolescents.
Taking into consideration the important of self-
regulation for risk-taking outcomes, Steinberg’s
social neuroscience perspective on adolescent
risk-taking20 posits that increases in risk-taking
are a result of heightened sensitivity to the social
context and its rewards (ie, peer acceptance), as
well as slower-developing self-regulatory processes
linked to rational decision-making. Both failure to
be accepted by peers and desire for higher social
status may increase vulnerability to risk behav-
iors, such as substance use. Earlier work by Tajfel
and Turner21,22 highlights why overweight and
obese adolescents may be more likely to experience
a negative peer context, which increases vulner-
ability to later risk-taking. As adolescents derive
their self-concept from the social group(s) to which
they belong, social status is often achieved by be-
having in ways that are normative for the group.
Adolescents who do not fit the group norm, such
as those who are different in physical appearance
(eg, obese adolescents), are less likely to be ac-
cepted by peers.23,24 Overweight and obese adoles-
cents are indeed at higher risk for peer alienation
and victimization than normal-weight peers.25-27
Those deviating from the group norm may try to
overcome their poor social status by engaging in
behaviors (eg, substance use) that will increase
status among certain social groups, like deviant
peers.28 They also may engage in risky behaviors,
like substance use, as a way to cope with the nega-
tive feelings stemming from poor social status.29,30
It appears that overweight and obese adolescents
may be experiencing a social context and lack of
self-regulation that increases their risk of engag-
ing in problematic substance use as they transi-
tion into adulthood. Prior cross-sectional stud-
ies have provided tentative evidence that higher
weight status in adolescence is related to problem-
atic cigarette smoking and alcohol use. A positive
relationship between cigarette smoking and body
mass index (BMI) has been reported among ear-
ly adolescent Danish boys.31 In a study of Portu-
guese adolescents, obese girls and boys were more
likely to report daily alcohol consumption and fre-
quent drunkenness compared to non-obese ado-
lescents.32 A study of Taiwanese adolescents also
found that girls and boys with higher BMI were
more likely than counterparts to report regular al-
cohol use and cigarette smoking, but not other il-
licit drugs.33 Furthermore, findings using a large
sample of US adolescents reported that obese girls,
but not boys, were more likely to use alcohol and
smoke cigarettes, but not marijuana.34
Findings from longitudinal studies examining
adolescent weight status and substance use are
more inconclusive and have mainly focused on to-
bacco use. A study of early adolescents in the US
indicated that obese girls were less likely to initiate
tobacco use 2 years later compared to non-obese
girls.35 On the other hand, another US study and a
Swedish study found that smoking initiation was
more likely among obese girls compared to non-
obese girls.36,37 No significant relationships were
found among boys. A recent study using 2 samples
of US adolescents indicated that BMI did not pre-
dict alcohol or other substance use 2 years later.38
Similarly, an epidemiological study of rural US
adolescents did not find a significant association
between obesity trajectory and substance use.39
The inconsistent results from these longitudinal
studies call attention to the need for additional
prospective and more comprehensive research.
The current study sought to clarify past find-
ings on adolescent weight status and risk of prob-
lematic substance use by utilizing a large sample
of US adolescents to identify whether overweight
or obesity status in adolescence is a predictor of
unique patterns of problematic substance use in
young adulthood. To achieve this end, a person-
centered approach, latent class analysis (LCA),
was utilized to identify unique patterns of prob-
lematic substance use by considering responses to
multiple items on cigarette smoking, alcohol use,
and marijuana use simultaneously. Prediction of
adolescent weight status to problematic substance
use patterns was then assessed.
METHODS
Participants
The current study used data from The Nation-
al Longitudinal Study of Adolescent Health (Add
Health), consisting of a nationally representative
sample of adolescents in grades 7-12 in the US
during the 1994-95 school year. Participants were
enrolled in 80 high schools and 52 middle schools.
During the initial wave of the study, 20,745 ado-
lescents in grades 7-12 (11-19 years of age) par-
ticipated in both a school survey and in-home in-
terview between April and December 1995. Written
informed consent was obtained from both parent
and adolescent. Participants were eligible to par-
ticipate in the second wave of data collection about
one year later (April-August 1996). A third wave
of in-home interviews occurred from July 2001 to
April 2002, which included 15,197 young adults
aged 18-26 years. Information was collected on
mental and physical health, health-risk behav-
iors, and contextual factors related to family, peer,
school, and neighborhood.
The analytic sample for the current study includ-
ed 15,119 of the 15,197 participants interviewed at
Wave 3 (young adulthood) during 2001-02; we ex-
cluded 78 persons for whom no substance use data
were available. Of these 15,119 young adults, 53%
were women; 54% White, 21% Black, 15% Latino;
7% Asian; 3% other. The average age of participants
at Wave 1 was 16.10 years ± 1.72 and at Wave 3 was
22.47 years ± 1.76. Wave 1 (adolescent) BMI% was
available for 97% of the analytic sample, with 25%
meeting overweight (14%) or obesity (11%) status.
In terms of socio-economic variables, 93% of partic-
Does Adolescent Weight Status Predict Problematic Substance
Use Patterns?
710
ipants in the sample reported mother education at
Wave 1. Of available data, 20% of mothers received
less than a high school education; 34% were high
school graduates; 19% completed some college;
and 28% completed college or beyond. Also, 75% of
parents of participants in the analytic sample com-
pleted an in-home interview at Wave 1, including
annual household income. Of available data, 29%
reported less than $25,000, 33% between $25,000
and $49,999; 23% between $50,000 and $74,999;
and 8% between $75,000 and $99,999.
Measures
Individual characteristics. Adolescents were
asked to report their sex (1 = female, 0 = male)
and race/ethnicity at Wave 1. Ethnicity variables
for African-American, Asian, Latino, and white
were dummy coded (eg, 1 = African-American, 0
= non-African-American). Adolescents also re-
ported on residential mother’s education status at
Wave 1 (1 = less than a high school education; 2
= high school grad; 3 = completed some college; 4
= completed college or beyond), which was used
as a proxy for SES, given that household income
was only available for 75% of participants who had
completed parent interviews at Wave 1.
Weight status. At Wave 1 (11-19 years old), ado-
lescents self-reported their height and weight. Self-
reported height and weight data have been found to
be reliable for 96% of adolescents in the Add Health
sample.40 Height and weight were used to calculate
age- and sex-specific BMI [weight(lbs)/[height(in)2]
x 703] percentiles using the Centers for Disease
Prevention (CDC) 2000 growth charts.41 Obesity
was defined as having a BMI percentile at or above
the 95th percentile, and overweight defined as hav-
ing a BMI percentile at or above the 85th percentile
and below the 95th percentile. Adolescents either
meeting overweight or obesity status were com-
bined to create an overweight/obesity indicator (1 =
overweight or obese, 0 = non-overweight or obese).
Substance use. At Wave 3 (18-26 years), young
adults responses to multiple questions on cigarette
smoking, alcohol use, and marijuana use were in-
cluded in analyses. Five items related to cigarette
smoking were selected, which included whether par-
ticipants had ever: (1) tried cigarette smoking, even
just 1 or 2 puffs (0 = no, 1 = yes); (2) smoked an en-
tire cigarette (0 = no, 1 = yes); (3) smoked cigarettes
regularly, that is, at least 1 cigarette every day for 30
days (0 = no, 1 = yes); and (4) smoked at all in the
past 30 days (0 = no, 1 = yes). They were also asked
(5) how many cigarettes smoked per day in past 30
days, which was recoded into a categorical item (0 =
none, 1 = 1, 2 = 2-9, 3 = 10-20, 4 = 20+ cigarettes).
Six items on alcohol use were included in analy-
ses. Participants were asked: (1) whether they had
drank more than 2 or 3 times since June 1995
(Wave 1) (0 = no, 1 = yes); (2) days consumed al-
cohol in the past year (0 = none, 1 = couple times
a year, 2 = couple times a month, 3 = 1-2 times a
week, 4 = 3-7 times a week); (3) days consumed
5 or more drinks in past 12 months (0 = none, 1
= couple times a year, 2 = once a month or less,
3 = couple times a month/week, 4 = 3-7 times a
week); (4) days consumed 5 or more drinks in the
last 2 weeks (0 = none, 1 = once, 2 = 2-9, 3 = 10+
times); (5) whether they had been drunk in the
past year (0 = none, 1 = couple times a year, 2 =
once a month or less, 3 = couple times a month/
week, 4 = 3-7 times a week); and (6) whether they
had driven while drinking since June 1995 (Wave
1) (0 = no, 1 = yes).
Three items related to marijuana use were also
selected for analyses. Participants were asked: (1)
whether they had used marijuana since June 1995
(Wave 1) (0 = no, 1 = yes); (2) whether they had used
marijuana in the past year (0 = no, 1 = yes); and (3)
number of times marijuana consumed in the past
30 days, which was recoded into a categorical item
(0 = none, 1 = once, 2 = 2-9, 3 = 10+ times).
Planned Analyses
Latent class analysis (LCA) is used to identify
underlying patterns among observed categorical
indicators (eg, substance use behaviors) and clas-
sify individuals who respond similarly into latent
classes.42-44 LCA is an iterative process using full
information maximum likelihood estimation. Us-
ing Mplus version 7,45 model-building steps were
taken to select the best-fitting class model of sub-
stance use in young adulthood and then ascertain
whether adolescent weight status and other in-
dividual characteristics predicted membership in
particular substance use classes.
Statistical indices, parameter estimates, and
practical implications are used to determine the
best-fitting model.43,44,46 The unconditional model is
first specified (ie, 1-class model), which is then used
as a comparison for an increasing number of class-
es until the models specified no longer converge or
have useful application. Statistical indices, like the
Bayesian Information Criterion (BIC)47 and the Lo-
Mendell-Rubin likelihood ratio test (LMR LRT),48 as
well as interpretability of classes are key in deter-
mining model selection. Item-response probabilities
refer to the likelihood that an individual in a given
latent class will endorse a particular item response.
They are used to confirm that individuals in each
latent class have similar response patterns to the
observed indicators and that class response pat-
terns are distinct from each other. After selecting
the best-fitting model, covariates are added to the
model. Logistic regression coefficients are estimated
by setting the beta parameter to 0 for the reference
class; thus, providing an estimation of log-odds that
indicate an endorsement of a covariate for a certain
class relative to the reference class.
Ethnicity, sex, and a proxy for socioeconomic
status (maternal education) were included in the
covariates analysis in addition to weight status,
as each is strongly tied to disparities in obesity
prevalence and substance use risk. Among adoles-
cents, African Americans and Latinos have higher
Lanza et al
Am J Health Behav.™ 2014;38(5):708-716 711 DOI:
http://dx.doi.org/10.5993/AJHB.38.5.8
overweight and obesity prevalence than Whites,
and boys are more likely to be overweight or obese
compared to girls.4 In young adulthood, men are
more likely to use marijuana, cigarette smoking is
more prevalent among Whites than African Ameri-
cans, and Whites and Latinos report more binge
drinking than African Americans.5 Generally, SES
indicators like parental education and household
income have shown that lower SES is associated
with higher weight status,49 although associations
with substance use are mixed.5
RESULTS
Descriptive Data
Table 1 compares the average rate of overweight/
obese adolescents’ substance use in young adult-
hood to non-overweight/obese adolescents. Across
all cigarette smoking indicators, overweight/obese
adolescents had higher rates compared to non-
overweight/obese adolescents. In contrast, over-
weight/obese adolescents had lower rates of high-
risk alcohol use compared to non-overweight/
obese adolescence. No significant differences were
found between groups for marijuana use.
Latent Class Analysis
Model selection. LCA was conducted to identify
latent classes of cigarette smoking, alcohol use,
and marijuana use in young adulthood. Table 2
presents the statistical fit indices for 5 classes (the
6-class model did not converge). Model selection is
generally based on a scree-like test, in which bet-
ter fitting models are represented where the indices
begin to level off.50 Although the 5-class model had
the lowest values in fit criteria, indices began to
level off significantly after the 3-class model; con-
sequently, the 3-, 4-, and 5-class models were fur-
ther explored before selecting a best-fitting model.
Examination of parameter estimates identified the
4-class model as best-fitting the data in terms of
classifying the underlying heterogeneity of ciga-
rette, alcohol, and marijuana use in the sample.
Class probabilities, homogeneity of item-response
within classes, and distinct item-response patterns
across classes were assessed to determine which
model was most interpretable.43,46 The 3-class mod-
el was able to identify a low and a high substance
use class, but the third class lacked homogeneity.
Two classes in the 5-class model lacked homogene-
ity and there was a lack of distinctiveness between
2 classes. Figure 1 illustrates the item-response
probabilities of each class of the 4-class model.
Classes appear homogenous and distinct, and
class sizes were found to be substantial as well.
Identified classes. Considering item-response
probabilities for each class (Figure 1), classes were
identified based on endorsement of substance use
behaviors. A little over one-third of the participants
(34.7%) reported very low substance use behavior
(Class 1; Low Substance Use). Of these, close to
80% stated that they had never smoked an en-
tire cigarette, over 95% stated they had not been
drunk or binged on alcohol, and almost 90% had
never tried marijuana.
Participants in the Regular Smokers class (Class
2; 12.4%) showed high endorsement of cigarette
use, with 96% reporting having been a regular
smoker at some point (at least 1 cigarette a day for
Table 1
Cigarette, Alcohol, and Marijuana Use in Young Adulthood:
Overweight/Obese vs. Non-overweight/Obese Adolescents
Overweight/Obese Non-overweight/Obese
Cigarette %
Tried cigarette
Smoked entire cigarette***
Smoked regularly***
Smoked past 30 days***
No. cigarettes per day (more than 1)***
74
61
41
35
32
73
59
38
32
29
Alcohol %
Drank since W1**
Alcohol in past year (multiple times per month or week)***
Binge drink in past year (multiple times per month or week) *
Binge drink in past 2 weeks*
Drunk past year (multiple times per month or week***
Drunk driving***
76
40
20
31
16
21
78
46
22
33
19
24
Marijuana %
Marijuana since W1
Marijuana past year
No. of times used marijuana in past year(more than once)
44
31
18
45
32
17
*** p < .001; ** p < .01; * p < .05
Does Adolescent Weight Status Predict Problematic Substance
Use Patterns?
712
past 30 days) and all reporting smoking in the past
30 days. Over one-third (38%) smoked 2-9 ciga-
rettes and just over half (52%) smoked 10 or more
cigarettes on days smoked in the past 30 days.
Similar to the Low Substance Use class, problem-
atic alcohol use was very low. Also, although 40%
had tried marijuana since the start of the study,
only one-fourth had used marijuana in the past
year.
The High-risk Alcohol Use class (Class 3; 32.6%)
was characterized by problematic alcohol use but
less risky cigarette and marijuana use. Approxi-
mately 70% stated they had used alcohol multi-
ple times a month or week in the past year, about
80% indicated they had engaged in binge drinking
or been drunk in the past year, and 50% stated
they have binged in the last 2 weeks. Also, 35%
reported drunk driving. In regards to cigarette and
marijuana use, few had ever been regular smokers
(16%), and almost none had smoked in the past 30
days. Although 39% reported using marijuana in
the past year, less than one-fourth reported using
more than once in the last year.
Last, the High Substance Use class (Class 4;
Table 2
Latent Class Model Fit Indices (N = 15,119)
Classes
Log
Likelihood
Free
Parameters BIC
Adjusted
BIC AIC
LMR LRT p-
value for k-1
1 -174995.39 30 350279.49 350184.15 350050.78 N/A
2 -146775.79 61 294138.63 293944.78 293673.58 .000
3 -134435.31 92 269756.00 269463.63 269054.62 .000
4 -128469.95 123 258123.61 257732.72 257185.89 .000
5 -123837.44 154 249156.94 248667.54 247982.89 .000
Note.
AIC = Akaike information criterion; BIC = Bayesian
information criterion; LMR LRT = Lo-Mendell-Rubin
likelihood
ratio test.
Figure 1
Substance Use Classes in Young Adulthood: Item-response
Probabilities
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
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P
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Item
3-7 times wk/20+
Couple times mo or wk/10+
Once a mo/2-9
Yes/Once/Couple times yr
No/None
Class 1
Low Substance Use
34.7%
Class 2
Regular Smokers
12.4%
Class 3
High-risk Alcohol Use
32.6%
Class 4
High Substance Use
20.2%
Lanza et al
Am J Health Behav.™ 2014;38(5):708-716 713 DOI:
http://dx.doi.org/10.5993/AJHB.38.5.8
20.2%) represents participants with the highest
levels of problematic substance use. Almost all
(99%) reported to be regular smokers who smoked
in the last 30 days, with over half smoking 10+
cigarettes on days smoked. Over 85% reported
drinking multiple times per month or week in the
past year, and the majority reported binge drinking
and being drunk in the past year (93%) and binge
drinking in the past 2 weeks (74%). Over half (55%)
stated they had driven drunk. Two-thirds (69%) re-
ported marijuana use in the last year, with 45%
using more than once in that period.
Predictors of class membership. Covariates
were added to the LCA model to determine wheth-
er adolescent weight status predicted particular
substance use classes. A covariate model includ-
ing weight status (overweight or obese), sex, race/
ethnicity (African American, Asian, Latino, White),
and maternal education was estimated simultane-
ously using latent multinomial logistic regression
(Table 3). Using the Low Substance Use class as
a reference class, adolescents meeting overweight
or obesity status had a greater likelihood of being
classified into the Regular Smokers class (β =.37,
OR = 1.45, p < .001) than the Low Substance Use
class. Similarly, overweight or obese adolescents
were more likely to belong to the Regular Smokers
class than the High Substance Use (β =.35, OR =
1.42, p < .001) and the High-risk Alcohol Use (β
=.43, OR = 1.54, p < .001) classes.
As for other individual characteristics (see Table
3 for statistical values), women were less likely to be
classified into any problematic substance use class
compared to the Low Substance Use class. African
Americans, Asians, and Latinos were less likely to
be classified into the High Substance Use or Regu-
lar Smokers classes than the Low Substance Use
class, and African Americans and Asians also were
less likely to belong to the High-risk Alcohol Use
class compared to the Low Substance Use class.
On the other hand, Whites were more likely to be-
long to the High-risk Alcohol Use class compared
to the Low Substance Use class. Adolescents re-
siding with mothers with higher education status
were more likely to be classified into the High Sub-
stance Use and High-risk Alcohol Use classes than
the Low Substance Use Class, but were less likely
to belong to the Regular Smokers class than the
Low Substance Use class. The covariate analysis
also was conducted with annual household in-
come, with results unchanged. Annual household
income was not included in the final model because
a significant proportion of the sample (25%) did not
have household income information, as this infor-
mation was collected with parent-report at Wave 1.
DISCUSSION
Sole consideration of average group differences
of substance use rates give an incomplete picture
of the potential risks overweight or obese adoles-
cents face in young adulthood. The average group
differences shown in Table 1 suggest that cigarette
smoking and alcohol use rates only vary slightly be-
tween overweight/obese and non-overweight/obese
groups. Statistical, but not clinically meaningful
differences, may contribute to a false assumption
that weight status is not an important predictor
of substance use. However, with the utilization of
Table 3
Estimated Odds Ratios (OR) of Class Membership in Relation to
Obesity,
Sex, Race/Ethnicity, and Education Indices ased on a
Multinomial Latent
Class Regression Model
Reference class: Low Substance Use (Class 1)
vs Regular Smokers
(Class 2)
vs High-risk Alcohol
Use (Class 3)
vs High Substance Use
(Class 4)
β(SE) OR(95%CI) β(SE) OR(95%CI) β(SE) OR(95%CI)
Overweight/ obese vs
non-overweight/obese .37(.07)*** 1.45(1.26-1.66) -.06(.05)
.95(.85-1.04) .02(.06) 1.02(.91-1.15)
Female vs Male -.20(.06)** .82(.73-.92) -.67(.05)*** .51(.46-
.56) -.95 (.06)*** .39(.34-.44)
African American vs.
non-AA -1.23(.18)*** .29(.21-.42) -1.03(.15)*** .36(.27-.48) -
1.75 (.17)*** .17(.12-.24)
Asian/Pacific Islander
vs non-API -.96(.20)** .38(.26-.57) -.58(.16)*** .56(.41-.77) -
.97(.18)*** .38(.27-.54)
Latino vs non-Latino -1.19(.18)*** .31(.21-.43) -.11(.16)
.90(.65-1.23) -1.08 (.17)*** .34(.24-.47)
White vs non-White -.16(.17) .86(.61-1.19) .29(.15)*
1.34(1.003-1.79) .24(.16) 1.27(.93-1.74)
Higher vs lower
mother education .-.16(.03)*** .85(.80-.90) .20(.02)***
1.22(1.17-1.27) .09(.02)*** 1.10(1.05-1.14)
*** p < .001; ** p < .01; * p < .05
Does Adolescent Weight Status Predict Problematic Substance
Use Patterns?
714
a person-centered approach, not only were unique
patterns of substance use behavior in young adult-
hood identified, but a more comprehensive assess-
ment of adolescent weight status as a risk factor for
problematic substance use was achieved.
Ultimately, the key relationship between high-
er weight status and problematic substance use
points to regular cigarette smoking. Overweight
or obese adolescents had a greater likelihood of
belonging to the Regular Smokers class in young
adulthood than any other class. On the other
hand, overweight or obesity status in adolescence
did not predict greater likelihood of belonging to
the High-risk Alcohol Use of High Substance Use
classes; consequently, higher weight status does
not appear to be a risk factor for problematic al-
cohol or marijuana use. Also, given that over-
weight or obese adolescents did not have a lower
likelihood of belonging to the Low Substance Use
class vs problematic substance use classes, higher
weight status does not appear to lower the likeli-
hood of problematic substance use behavior.
Although the current study clearly indicates that
overweight or obese adolescents have a greater
likelihood of being a regular smoker in the absence
of problematic alcohol or marijuana use compared
to non-overweight/obese adolescents, past longi-
tudinal studies have reported mixed findings re-
garding the role of higher weight status on ciga-
rette smoking.35-38 Consideration of alcohol use
and marijuana use alongside cigarette smoking,
and assessment of cigarette smoking behaviors
other than smoking initiation, which was a focus of
previous studies, increases understanding of the
relationship between weight status and cigarette
smoking. One of the main questions arising from
the current findings pertains to why higher weight
status is related specifically to regular cigarette
smoking but not other forms of problematic sub-
stance use. Although there are many hypotheses
linking higher weight status to cigarette smoking,
to date, only a handful of studies present evidence
on the potential pathways by which higher weight
status in adolescence is linked to cigarette smok-
ing. For instance, overweight and obese individu-
als may initiate cigarette smoking because they
perceive it as an effective weight loss strategy.51,52
Also, perception of being overweight or obese and
focus on body size are related to smoking initia-
tion, particularly among adolescent girls.37,53 In
addition to social factors, biological ones also may
inform the relationship between higher weight sta-
tus and regular cigarette smoking. Food and drugs
are known to activate the same neurological path-
ways containing dopaminergic receptors linked
to reward sites in the brain54,55 that may explain
their co-occurrence. For instance, recent studies
examining the pathway from cigarette smoking to
obesity from adolescence to young adulthood sug-
gest that decreased cigarette smoking is associ-
ated with increased weight status.56,57 The negative
relationship between decreased smoking and in-
creased weight status suggest smoking and eating
have similar neurophysiological response systems,
as noted by other studies.58,59 For this reason, bi-
directional relationships between weight status
and cigarette smoking during the transition from
adolescent to young adulthood should be explored
more fully in future studies.
Other findings from the current study revealed
that ethnic and sex differences in substance use
membership were generally in line with previous
findings. Similar to prevalence rates reported in
the National Survey on Drug Use and Health,5 re-
sults showed that African-Americans, Asians, and
Latinos were at lower risk of problematic cigarette,
alcohol, and marijuana use, and males were at
higher risk of belonging to problematic substance
use classes. Future research should seek to as-
sess whether ethnicity and/or sex moderates the
relationship between higher weight status and sub-
stance use, as this is yet unclear. Given that ethnic
and sex disparities exist among substance use, as
well as obesity status,4 these differences may influ-
ence the degree to which risk behaviors are engaged
in by overweight or obese adolescents from specific
ethnic and/or sex groups. For instance, if the objec-
tive to engage in regular cigarette smoking for over-
weight or obese adolescents is to lose weight, this
relationship may be stronger among white females
than other groups, as they are most often subjected
to social stigma and other negative social conse-
quences resulting from higher weight status.60
Of course, several limitations need to be con-
sidered. First, the current study relied on self-
reported height and weight to measure BMI% for
adolescents. Although measured BMI data is fa-
vored over self-report, relatively minor differences
in reliability between self-reported and measured
BMI data have been reported in adolescence40,61
and numerous studies have successfully used
ADD Health self-reported BMI data.62-64 Second, it
is important to note that weight status was only
accounted for at one point in time during adoles-
cence. It is unknown whether adolescents meeting
overweight or obesity status at Wave 1 met over-
weight or obesity status across most or all years of
adolescence. Similarly, we expect that some ado-
lescents meeting overweight or obese status at dif-
ferent points in time during adolescence were not
accounted for in the analyses. BMI data are avail-
able one year after Wave 1 (Wave 2) and 60% of
participants meeting overweight or obesity status
in Wave 1 also met overweight or obesity status in
Wave 2. Third, the study was unable to examine
socio-contextual and neighborhood variables that
may inform how higher weight status contributes
to cigarette smoking risk, such as low peer status
or limited neighborhood resources for maintaining
healthy weight. Fourth, the variation of age in the
sample at each assessment point (eg, 18-26 years
at Wave 3 increases the difficulty in interpreting
findings as a result of developmental milestones,
such as transition to college when high-risk alco-
Lanza et al
Am J Health Behav.™ 2014;38(5):708-716 715 DOI:
http://dx.doi.org/10.5993/AJHB.38.5.8
hol use increases substantially.
Acknowledging these limitations, the current
study still has important implications for public
health efforts aimed to mitigate health-risk behav-
iors among young adults. Specifically, emphasis
should be placed on decreasing the risk of ciga-
rette smoking in overweight or obese adolescents.
Although more research is needed to identify the
processes by which adolescent weight status influ-
ences cigarette smoking risk, physicians and other
health professionals should address smoking risk
with overweight or obese adolescents and probe for
psychosocial or physiological stressors that may
initiate high-risk smoking activity. Adolescents are
exposed to many psychosocial stressors as they
transition into young adulthood (eg, college, em-
ployment, leaving home). Taking on the responsi-
bilities of their own health behaviors may be too
difficult for some adolescents already negotiating
with significant developmental changes. Over-
weight and obese adolescents may find themselves
dealing with these types of stressors; on top of this
they likely may be experiencing social exclusion
and victimization. The culmination of risks may
contribute to an overweight/obese adolescent’s de-
cision to engage in regular smoking behavior as
a weight management strategy and/or to decrease
anxiety. They may be especially willing to engage
in regular cigarette smoking if they believe smok-
ing has similar effects on their physiological state
as eating does (eg, feeling calm, pleasure). How-
ever, without knowing the health service needs of
overweight and obese adolescents, as well as other
socio-contextual factors that largely influence obe-
sity risk (physical activity resources, access to and
knowledge of healthy nutrition), intervention ef-
forts targeting smoking among overweight or obese
youth will not be as effective. Empirical studies
that can integrate multiple lines of research on
obesity and substance use risk are warranted to
answer questions about preventing and treating
health risks in this unique population.
Human Subjects Statement
The following study has been approved by the
University of California, Los Angeles Institutional
Review Board (#10-001106).
Conflict of Interest Statement
None of the authors have conflict of interests
pertaining to this study.
Acknowledgement
This study is supported by the National Institute
of Drug Abuse (R03DA033497 and T32DA007272).
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Lease Versus Purchase Paper Grading Guide
FIN/370 Version 8
1
Learning Team: Lease Versus Purchase Paper
Purpose of Assignment
Students compare the factors involved in leasing versus
purchasing capital assets.
Resources Required
Ch. 27 of Basic Finance
Grading Guide
Content
70 Percent
Met
Partially Met
Not Met
Comments:
Discuss the factors involved in making a lease versus purchase
decision.
Discuss the application of time value of money concepts used in
evaluating lease versus purchase decisions.
The paper is no more than 350 words in length.
Total Available
Total Earned
X
#/X
Writing Guidelines
30 Percent
Met
Partially Met
Not Met
Comments:
The paper—including tables and graphs, headings, title page,
and reference page—is consistent with APA formatting
guidelines and meets course-level requirements.
Intellectual property is recognized with in-text citations and a
reference page.
Paragraph and sentence transitions are present, logical, and
maintain the flow throughout the paper.
Sentences are complete, clear, and concise.
Rules of grammar and usage are followed including spelling and
punctuation.
Total Available
Total Earned
X
#/X
Assignment Total
#
X
#/5
Additional comments:
Copyright © 2014 by University of Phoenix. All rights reserved.
Intermediate-Term Debt and Leasing
The previous chapter covered various short-term sources of
finance, commercial bank loans, trade credit, commercial paper,
secured loans, and factoring. Chapters 12 through 15 covered a
variety of long-term, fixed-income securities ranging from
straight bonds to convertible bonds and preferred stock.
Between these extremes are intermediate-term bonds and
leasing. Intermediate-term debt ranges from 5 to 10 years and is
obtained through commercial banks and insurance companies.
Term notes may also be sold to the general public.
Some firms own properties in order to lease the properties to
others. Washington Real Estate Trust owns office buildings,
industrial centers, apartments, and shopping centers in the
Washington, D.C., area and rents the space to stores such as
Williams-Sonoma, Laura Ashley, and Giant Food. These retail
establishments want the use of the asset but not ownership.
They prefer to lease the space instead of buying and operating
the buildings.
The term of a lease may range from a short period such as a
year or two to many years. Since leases create legal obligations
(the lease payments), they are an alternative to short-,
intermediate-, and long-term debt as a source of funds. This
chapter describes the terms of a lease and illustrates the basic
analysis of leasing versus borrowing and buying the asset. Since
leases are an alternative to debt financing, this section also
covers when lease obligations must be capitalized and placed on
the firm’s balance sheet as a debt obligation.
Intermediate-Term Debt
While accountants classify all liabilities as either short-term
(due in less than one year) or long-term (due in more than one
year), debt can also be classified as short-term, intermediate-
term, or long-term. Intermediate-term debt is outstanding for
more than a year (and hence appears as long-term debt on the
firm’s balance sheet), but it matures quicker than long-term
debt. While long-term bonds may mature 20, 25, or 30 years
after being issued, most intermediate-term debt will mature in 5
to 10 years.
Intermediate-term debt issued by corporations and sold to the
general public may be referred to as “notes” to differentiate it
from the bonds of the corporation, which are long-term debt.
For example, in July 2008, H. J. Heinz issued $500 million of
5.35 percent notes due in 2013 (5 years to maturity). Different
terminology may be used when intermediate-term debt is
obtained from a commercial bank or an insurance company.
Such debt is often referred to as a term loan.
Term loans are usually secured by equipment or real estate.
Commercial banks, which make term loans of 1 to 5 years’
duration, generally require that the loan be secured by
equipment. Insurance companies, which tend to make term loans
of from 5 to 15 years, generally use real estate as collateral for
the loan.
In addition to the collateral, term loans have restrictive
covenants that are negotiated between the debtor and the
creditor. Common restrictions include a minimum current ratio
such as 2.0:1, or a minimum amount of net working capital (that
is, the difference between current assets and current liabilities
must exceed some specified dollar amount). The creditors also
require periodic financial statements from the borrower and may
require prior approval before the debtor can issue additional
debt. While these restrictive covenants are common in term loan
agreements, they do not exhaust all the possibilities, as each
loan is individually negotiated. Conditions in the credit markets
and the relative strengths of the parties also affect the terms.
Term loans are generally retired in periodic payments and hence
are like mortgage loans. The repayment schedules call for the
payment of interest and the retirement of the principal. For
example, a firm buys equipment that costs $12,000 and has an
expected life of 5 years. The firm arranges a term loan with a
commercial bank. The following conditions apply:
1. a down payment of 20 percent of the cost of the equipment
2. five equal annual payments to pay the interest and retire the
loan
3. a 9 percent interest rate on the declining balance
4. the loan to be secured by the equipment
The first condition establishes the amount that the bank is
willing to loan. Notice that the bank does not lend the entire
amount; the borrower must put up $2,400 (0.20 × $12,000) and
the bank finances the balance, $9,600. Terms 2 and 3 establish
the rate of interest and the payment schedule. The fourth term
designates the equipment as collateral against the loan and gives
the bank the right to take the equipment and sell it should the
debtor default.
The repayment schedule is determined as follows. The borrower
must make equal payments so that the bank earns 9 percent
annually and the loan is retired in 5 years. This is another
illustration of the time value of money. The equation necessary
to solve this problem (that is, to determine the annual payments)
is
Calculator
Solution
Function Key
Data Input
PV =
–9,600
FV =
0
I =
9
N =
5
PMT =
?
Function Key
Answer
PMT =
2468.09
This is an example of an annuity, so the problem collapses to:
PMT(PVAIF 9I, 5N) =
$9,600
PMT(3.890) =
$9,600
PMT =
$9,600/3.890 = $2,467.87.
Thus, $2,467.87 is the annual payment that retires this loan and
pays 9 percent of the declining balance.
The actual payment schedule and the division of the payment
into interest payment and principal reduction are given
in Exhibit 27.1. This table is essentially the same as the
mortgage loan amortization schedule illustrated in Exhibit
7.2 (page 124) in Chapter 7. In both examples, the amount of
the interest declines with each payment as the outstanding
balance on the loan is reduced. Conversely, the amount of the
principal repayment rises with each payment as the interest
payment is reduced.
Generally, the depreciation of the equipment and the resulting
cash flow cover the required loan payments. In this case, the
annual straight-line depreciation expense would be $2,400
($12,000/5). The cash flow generated by this $2,400 noncash
depreciation expense is approximately equal to the $2,467.87
payment required by the loan. (In many cases accelerated
depreciation is used so that the initial depreciation expense is
increased.) By matching the repayment schedule with the cash
flow, the firm enhances its capacity to service the debt.
Exhibit 27.1 Repayment Schedule for a $9,600 Term Loan at 9
Percent for Five Years
Year
Payment
Interest
Principal Retirement
Balance Owed on Loan
1
$2,467.87
$864.00
$1,603.87
$7,996.13
2
2,467.87
719.65
1,748.22
6,247.91
3
2,467.87
562.31
1,905.56
4,342.35
4
2,467.87
390.81
2,077.06
2,265.29
5
2,467.87
203.87
2,264.00
1.29*
*The $1.29 results from rounding off in using the interest
tables. The $2,468.09 payment determined by the financial
calculator avoids this error.
Since each loan is individually negotiated between the borrower
and the lender, a variety of possible terms exist. One possibility
is for the lender to require equal principal repayments with
interest being computed on the remaining balance for each
period. The repayment schedule under these terms for the
$9,600 term loan is presented in Exhibit 27.2. In this case, the
principal is retired in five equal installments of $1,920
($9,600/5 = $1,920 in the second column). The amount of
interest (column 3) depends on the balance owed (column 4).
Thus, the payment in the second year is the sum of the principal
repayment ($1,920) plus the interest on the balance owed at the
end of the first year ($691.20), for a total payment of $2,611.20
(column 5).
Exhibit 27.2 Repayment Schedule for a $9,600 Term Loan at 9
Percent with Equal Principal Repayments
Year
Principal Repayment
Interest
Balance of Loan
Total Payment
1
$1,920
$864.00
$7,680
$2,784.00
2
1,920
691.20
5,760
2,611.20
3
1,920
518.40
3,840
2,438.40
4
1,920
345.60
1,920
2,265.60
5
1,920
172.80
0
2,092.80
Other possible terms include no principal repayment until the
loan is due at the end of the fifth year. In this case, the firm
would annually remit the $864 interest payment, and at the end
of the fifth year make the last interest payment plus the
principal repayment ($864 + $9,600 = $10,464). The lender
could combine the two previous illustrations and annually
require a partial principal repayment (for example, $1,000
annually) with the balance of $4,600 ($9,600 – $5,000) paid at
the end of the term of the loan. Such a lump repayment at the
end of a loan is referred to as a balloon payment.
Although firms obtain intermediate-term credit from banks and
insurance companies, intermediate-term securities may be sold
to the general public. Notes sold to the general public are not
collateralized, while term loans usually are, and generally the
notes do not have a compulsory repayment schedule. Such notes
are really more similar to long-term bonds than to term loans.
However, these notes may have specific features that make them
attractive to investors. The intermediate term (for example, 7
years) may make these notes attractive to investors who do not
want to make investments for a longer term (such as 20 years).
In addition, intermediate-term notes frequently cannot be called
and refunded before maturity. Since the notes lack a call
feature, the investor knows that the firm cannot force the buyer
to give up the security should interest rates fall. Many long-
term bonds are called and refunded when long-term interest
rates fall, so this noncallability of intermediate-term notes
assures investors of their interest income (if no default) for the
term of the notes.
Leasing
Leasing is essentially renting, and the two terms are often
interchanged. Since lease contracts may cover any time period,
lease financing may be an alternative to short- or long-term
debt.
A lease contract is for the use of an asset such as plant or
equipment. Firms want the use of the asset. They use the capital
budgeting techniques (net present value and internal rate of
return) to determine which investments are profitable. After
deciding which investments to make, they must decide how to
finance the asset. Notice that it is the use of the asset that the
firm desires and not necessarily title to the asset. Leasing
permits the firm (lessee) to use the asset without acquiring title,
which is retained by the owner (the lessor). In return, the lessee
enters into a contract (thelease) to make specified payments for
the use of the asset.
Leases take one of two forms. An operating lease provides the
lessee with the use of the asset and may include a maintenance
contract. The cost of servicing the equipment is built into the
lease. The contract may be canceled after proper notice if the
lessee wants to change equipment. This type of lease is
primarily used for renting equipment, cars, and trucks. The
length of the lease is less than the expected life of the asset but
the lease may be renewed. Since the lease is not for the life of
the asset, the lessor anticipates either having the lease renewed
or selling the asset at the lease’s expiration.
A financial lease, which may also be referred to as
a capital lease, differs from an operating lease in several
significant ways. These contracts are not cancelable and do not
include a service clause. The duration of a financial lease is the
expected life of the asset. The lease payments cover the cost of
the asset and earn a set return for the lessor. Thus, a financial
lease is similar to debt financing. If the firm had issued bonds
to obtain the funds to acquire the asset, the payments to the
bondholders would cover the cost of the equipment plus their
return (the rate of interest). Of course, if debt had been used,
the firm would own the asset, while with leasing it does not
acquire title. This difference is important if at the end of the
asset’s life there is residual value that accrues to the asset’s
owner.
While there are two classes of leases, there are three types of
lease agreements. From the viewpoint of the lessee, the type of
lease agreement is immaterial; the firm still acquires the use of
the asset. The type of lease has an impact only on the lessor.
The first type of lease agreement is thedirect lease. The lessor
owns the asset and directly leases it to the lessee. Direct leases
are offered by manufacturers who build the asset, such as IBM,
as well as by finance companies and leasing companies that
acquire assets with the intent to lease them to prospective users.
The second type of lease is a sale and leaseback. Under this
type of agreement, the firm that owns the asset sells it to the
lessor and then leases it back. The selling firm receives cash
from the sale to the lessor that can be put to other uses but still
retains the use of the asset. The lessee, however, relinquishes
title to the asset and thus loses any residual value that the asset
might have. And, of course, the firm must now make the lease
payments.
The third type of lease is a leveraged lease. Since the lessor
owns the asset, that firm must have the funds to acquire it. In a
leveraged lease the lessor borrows part of the funds necessary to
acquire the asset. For example, a finance company may borrow
from a commercial bank so that it may acquire an asset that it in
turn leases to the ultimate users. If financial leverage is
favorable, the lessor will increase the return on its funds
invested in the asset.
Lease or Purchase
The question of whether it is better to buy or to lease depends
on several crucial variables. These include the firm’s tax
bracket, the terms of the lease, the asset’s anticipated residual
value, and the cost of obtaining funds to buy the asset. While
this introductory text cannot develop this topic, the following
example will provide some of the essential information
necessary to make the choice.
A firm decides to acquire equipment that costs $5,000. The
equipment has an expected life of five years, after which the
equipment will be sold for an expected salvage value of $500.
Depreciation will be straight-line. (The firm would use
accelerated depreciation if possible, and the depreciation
expense would start after six months have elapsed. These
normal conditions are ignored to simplify the illustration.)
Maintenance is expected to be $200 annually, and the firm’s tax
rate is 40 percent. The purchase is financed entirely with a
$5,000 loan that is retired through an annual $1,285 payment
covering interest and principal (that is, the payments are a
mortgage schedule). The annual cash outflows and inflows are
shown in Exhibit 27.3.
Initially, there is an immediate cash $5,000 outflow to pay for
the equipment but that is covered by the loan, so there is no
immediate cash outflow. At the end of the first year, there is a
$200 cash outflow for maintenance, $450 for interest, and $835
for principal repayment, for a total of $1,485. Notice that the
$1,000 depreciation is not a cash outflow because it is a
noncash expense.
Exhibit 27.3 Determination of Cash Outflows from Owning
The outflows are partially offset by the tax savings that result
from tax-deductible expenses. These expenses are the $200
maintenance, the $450 interest, and the $1,000 depreciation.
Notice the principal repayment is not tax deductible. The sum of
the tax deductible expense is $1,650, and since the tax rate is 40
percent, these expenses reduce income taxes by $660 so the net
cash outflow is $825 ($1,485 – 660). Notice that the net cash
outflow grows each year because the principal repayment
increases and it is not a tax-deductible expense.
At the end of the fifth year, the equipment is sold for $500. The
sale is a cash inflow, but if an asset is sold for more than its
book value, the cash inflow is reduced by the taxes generated by
the sale. (If the asset were sold for less than its book value, the
sale would reduce taxes.) In this illustration, the asset is
completely depreciated, so its book value is $0. All of the sale
is taxable income, so the firm nets only $300 after paying taxes
of $200 on the $500 sale.
Alternatively, the firm could lease the equipment from a lessor
who wants a 10 percent return. To determine the annual lease
payments, the lessor answers the following question: How much
must I charge each year so that my $5,000 invested in the
equipment yields 10 percent? (There is no reason to assume the
interest rate lessee pays to borrow is the same rate the lessor
wants to earn on the lease.) That is,
The interest factor is 3.791, so the equation becomes
PMT(3.791) =
$1,319
PMT = $5,000/3.791 =
$1,319.
For the lessor to earn 10 percent, the annual lease payment
should be $1,319.
Calculator

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708There is a wealth of literature highlighting the ne.docx

  • 1. 708 T here is a wealth of literature highlighting the negative physical (eg, type II diabetes, car- diovascular problems) and psychosocial (eg, depression, low self-worth) consequences of ado- lescent obesity.1-3 However, less attention has been given to the role adolescent weight status plays in future health-risk behaviors, such as problematic substance use. With adolescent overweight and obesity rates remaining high (33.6% overweight, 18.4% obese 12-19 years),4 and substance use more prevalent in young adulthood than any other developmental period,5 identification of adolescent weight status as a predictor of future problematic substance use behavior is likely to have a signifi- cant impact on research and clinical work aimed to reduce multiple health risks in the transition from adolescence to adulthood. Adolescence is a crucial period for prevention ef- forts aimed to reduce problematic substance use in young adulthood. According to the National Survey of Drug Use and Health,5 young adults have the highest rates of current tobacco use (39.5% overall including 33.5% cigarette use) and illicit drug use (21.4%), with 19.0% using marijuana in the past month. Binge drinking has been reported for 39.8% and heavy alcohol use for 12.1% of 18- to 25-year-
  • 2. olds. In the past 30 years, many epidemiological longitudinal studies have identified several key risk factors for problematic substance use, includ- ing regular cigarette smoking, binge drinking, and marijuana use, in adolescence and young adult- hood. Temperament,6 behavioral disinhibition,7 ex- ternalizing behaviors,8 poor parental monitoring,9 lack of parental support,10 negative peer interac- tions,11 and affiliation with deviant peers12 have been well-established as critical factors involved in the development of problematic substance use.13-15 Considering the array of risk factors in adolescence contributing to future problematic substance use, it is likely that other health-risk conditions, such as overweight or obesity status, are linked to prob- lematic substance use behavior. Little is currently known about the relationship between adolescent weight status and future prob- lematic substance use; however, use of an adoles- cent developmental framework is likely to increase our understanding of why this relationship may be a significant one to address. One explanation may be that a shared underlying factor like impulsivity may explain co-occurring obesity and problematic substance use. As children learn to self-regulate behaviors, those who have difficulties with self- control are more likely to over-consume energy- dense food contributing to obesity risk16,17 and en- gage in antisocial behaviors leading to substance abuse and dependence.18,19 Although a shared underlying factor explanation is plausible, under- standing adolescent behavior without considering the social context is incomplete. H. Isabella Lanza, Research Associate and Christine E. Grel-
  • 3. la, Professor-in-Residence, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles. Paul J. Chung, Associate Professor, Department of Pediatrics, University of California, Los Angeles. Correspondence Dr Lanza: [email protected] Does Adolescent Weight Status Predict Problematic Substance Use Patterns? H. Isabella Lanza, PhD; Christine E. Grella, PhD; Paul J. Chung, MD Objectives: To identify underlying pat- terns of cigarette smoking, alcohol use, and marijuana use in young adulthood, and ascertain whether adolescent over- weight or obesity status predicts prob- lematic substance use patterns. Methods: The study included 15,119 participants from the National Longitudinal Study of Adolescent Health (Add Health) at Wave 1 (11-19 years) and Wave 3 (18-26 years). Latent class analysis was conducted. Re- sults: Participants were classified into a Low Substance Use (35%), Regular Smok- ers (12%), High-risk Alcohol use (33%), or High Substance Use (20%) class. Over- weight/obese adolescents had a greater likelihood of belonging to the Regular Smokers class. Conclusions: Overweight/ obese adolescents are at higher risk of en- gaging in regular cigarette smoking with- out problematic alcohol or marijuana use. Key words: adolescence, alcohol, ciga- rette smoking, marijuana, obesity, young
  • 4. adulthood Am J Health Behav. 2014;38(5):708-716 DOI: http://dx.doi.org/10.5993/AJHB.38.5.8 Lanza et al Am J Health Behav.™ 2014;38(5):708-716 709 DOI: http://dx.doi.org/10.5993/AJHB.38.5.8 Critical to the discussion on risk-taking behav- iors is the knowledge that social standing among peers is a prominent goal for most adolescents. Taking into consideration the important of self- regulation for risk-taking outcomes, Steinberg’s social neuroscience perspective on adolescent risk-taking20 posits that increases in risk-taking are a result of heightened sensitivity to the social context and its rewards (ie, peer acceptance), as well as slower-developing self-regulatory processes linked to rational decision-making. Both failure to be accepted by peers and desire for higher social status may increase vulnerability to risk behav- iors, such as substance use. Earlier work by Tajfel and Turner21,22 highlights why overweight and obese adolescents may be more likely to experience a negative peer context, which increases vulner- ability to later risk-taking. As adolescents derive their self-concept from the social group(s) to which they belong, social status is often achieved by be- having in ways that are normative for the group. Adolescents who do not fit the group norm, such as those who are different in physical appearance (eg, obese adolescents), are less likely to be ac-
  • 5. cepted by peers.23,24 Overweight and obese adoles- cents are indeed at higher risk for peer alienation and victimization than normal-weight peers.25-27 Those deviating from the group norm may try to overcome their poor social status by engaging in behaviors (eg, substance use) that will increase status among certain social groups, like deviant peers.28 They also may engage in risky behaviors, like substance use, as a way to cope with the nega- tive feelings stemming from poor social status.29,30 It appears that overweight and obese adolescents may be experiencing a social context and lack of self-regulation that increases their risk of engag- ing in problematic substance use as they transi- tion into adulthood. Prior cross-sectional stud- ies have provided tentative evidence that higher weight status in adolescence is related to problem- atic cigarette smoking and alcohol use. A positive relationship between cigarette smoking and body mass index (BMI) has been reported among ear- ly adolescent Danish boys.31 In a study of Portu- guese adolescents, obese girls and boys were more likely to report daily alcohol consumption and fre- quent drunkenness compared to non-obese ado- lescents.32 A study of Taiwanese adolescents also found that girls and boys with higher BMI were more likely than counterparts to report regular al- cohol use and cigarette smoking, but not other il- licit drugs.33 Furthermore, findings using a large sample of US adolescents reported that obese girls, but not boys, were more likely to use alcohol and smoke cigarettes, but not marijuana.34 Findings from longitudinal studies examining adolescent weight status and substance use are
  • 6. more inconclusive and have mainly focused on to- bacco use. A study of early adolescents in the US indicated that obese girls were less likely to initiate tobacco use 2 years later compared to non-obese girls.35 On the other hand, another US study and a Swedish study found that smoking initiation was more likely among obese girls compared to non- obese girls.36,37 No significant relationships were found among boys. A recent study using 2 samples of US adolescents indicated that BMI did not pre- dict alcohol or other substance use 2 years later.38 Similarly, an epidemiological study of rural US adolescents did not find a significant association between obesity trajectory and substance use.39 The inconsistent results from these longitudinal studies call attention to the need for additional prospective and more comprehensive research. The current study sought to clarify past find- ings on adolescent weight status and risk of prob- lematic substance use by utilizing a large sample of US adolescents to identify whether overweight or obesity status in adolescence is a predictor of unique patterns of problematic substance use in young adulthood. To achieve this end, a person- centered approach, latent class analysis (LCA), was utilized to identify unique patterns of prob- lematic substance use by considering responses to multiple items on cigarette smoking, alcohol use, and marijuana use simultaneously. Prediction of adolescent weight status to problematic substance use patterns was then assessed. METHODS Participants
  • 7. The current study used data from The Nation- al Longitudinal Study of Adolescent Health (Add Health), consisting of a nationally representative sample of adolescents in grades 7-12 in the US during the 1994-95 school year. Participants were enrolled in 80 high schools and 52 middle schools. During the initial wave of the study, 20,745 ado- lescents in grades 7-12 (11-19 years of age) par- ticipated in both a school survey and in-home in- terview between April and December 1995. Written informed consent was obtained from both parent and adolescent. Participants were eligible to par- ticipate in the second wave of data collection about one year later (April-August 1996). A third wave of in-home interviews occurred from July 2001 to April 2002, which included 15,197 young adults aged 18-26 years. Information was collected on mental and physical health, health-risk behav- iors, and contextual factors related to family, peer, school, and neighborhood. The analytic sample for the current study includ- ed 15,119 of the 15,197 participants interviewed at Wave 3 (young adulthood) during 2001-02; we ex- cluded 78 persons for whom no substance use data were available. Of these 15,119 young adults, 53% were women; 54% White, 21% Black, 15% Latino; 7% Asian; 3% other. The average age of participants at Wave 1 was 16.10 years ± 1.72 and at Wave 3 was 22.47 years ± 1.76. Wave 1 (adolescent) BMI% was available for 97% of the analytic sample, with 25% meeting overweight (14%) or obesity (11%) status. In terms of socio-economic variables, 93% of partic-
  • 8. Does Adolescent Weight Status Predict Problematic Substance Use Patterns? 710 ipants in the sample reported mother education at Wave 1. Of available data, 20% of mothers received less than a high school education; 34% were high school graduates; 19% completed some college; and 28% completed college or beyond. Also, 75% of parents of participants in the analytic sample com- pleted an in-home interview at Wave 1, including annual household income. Of available data, 29% reported less than $25,000, 33% between $25,000 and $49,999; 23% between $50,000 and $74,999; and 8% between $75,000 and $99,999. Measures Individual characteristics. Adolescents were asked to report their sex (1 = female, 0 = male) and race/ethnicity at Wave 1. Ethnicity variables for African-American, Asian, Latino, and white were dummy coded (eg, 1 = African-American, 0 = non-African-American). Adolescents also re- ported on residential mother’s education status at Wave 1 (1 = less than a high school education; 2 = high school grad; 3 = completed some college; 4 = completed college or beyond), which was used as a proxy for SES, given that household income was only available for 75% of participants who had completed parent interviews at Wave 1. Weight status. At Wave 1 (11-19 years old), ado- lescents self-reported their height and weight. Self-
  • 9. reported height and weight data have been found to be reliable for 96% of adolescents in the Add Health sample.40 Height and weight were used to calculate age- and sex-specific BMI [weight(lbs)/[height(in)2] x 703] percentiles using the Centers for Disease Prevention (CDC) 2000 growth charts.41 Obesity was defined as having a BMI percentile at or above the 95th percentile, and overweight defined as hav- ing a BMI percentile at or above the 85th percentile and below the 95th percentile. Adolescents either meeting overweight or obesity status were com- bined to create an overweight/obesity indicator (1 = overweight or obese, 0 = non-overweight or obese). Substance use. At Wave 3 (18-26 years), young adults responses to multiple questions on cigarette smoking, alcohol use, and marijuana use were in- cluded in analyses. Five items related to cigarette smoking were selected, which included whether par- ticipants had ever: (1) tried cigarette smoking, even just 1 or 2 puffs (0 = no, 1 = yes); (2) smoked an en- tire cigarette (0 = no, 1 = yes); (3) smoked cigarettes regularly, that is, at least 1 cigarette every day for 30 days (0 = no, 1 = yes); and (4) smoked at all in the past 30 days (0 = no, 1 = yes). They were also asked (5) how many cigarettes smoked per day in past 30 days, which was recoded into a categorical item (0 = none, 1 = 1, 2 = 2-9, 3 = 10-20, 4 = 20+ cigarettes). Six items on alcohol use were included in analy- ses. Participants were asked: (1) whether they had drank more than 2 or 3 times since June 1995 (Wave 1) (0 = no, 1 = yes); (2) days consumed al- cohol in the past year (0 = none, 1 = couple times a year, 2 = couple times a month, 3 = 1-2 times a week, 4 = 3-7 times a week); (3) days consumed
  • 10. 5 or more drinks in past 12 months (0 = none, 1 = couple times a year, 2 = once a month or less, 3 = couple times a month/week, 4 = 3-7 times a week); (4) days consumed 5 or more drinks in the last 2 weeks (0 = none, 1 = once, 2 = 2-9, 3 = 10+ times); (5) whether they had been drunk in the past year (0 = none, 1 = couple times a year, 2 = once a month or less, 3 = couple times a month/ week, 4 = 3-7 times a week); and (6) whether they had driven while drinking since June 1995 (Wave 1) (0 = no, 1 = yes). Three items related to marijuana use were also selected for analyses. Participants were asked: (1) whether they had used marijuana since June 1995 (Wave 1) (0 = no, 1 = yes); (2) whether they had used marijuana in the past year (0 = no, 1 = yes); and (3) number of times marijuana consumed in the past 30 days, which was recoded into a categorical item (0 = none, 1 = once, 2 = 2-9, 3 = 10+ times). Planned Analyses Latent class analysis (LCA) is used to identify underlying patterns among observed categorical indicators (eg, substance use behaviors) and clas- sify individuals who respond similarly into latent classes.42-44 LCA is an iterative process using full information maximum likelihood estimation. Us- ing Mplus version 7,45 model-building steps were taken to select the best-fitting class model of sub- stance use in young adulthood and then ascertain whether adolescent weight status and other in- dividual characteristics predicted membership in particular substance use classes.
  • 11. Statistical indices, parameter estimates, and practical implications are used to determine the best-fitting model.43,44,46 The unconditional model is first specified (ie, 1-class model), which is then used as a comparison for an increasing number of class- es until the models specified no longer converge or have useful application. Statistical indices, like the Bayesian Information Criterion (BIC)47 and the Lo- Mendell-Rubin likelihood ratio test (LMR LRT),48 as well as interpretability of classes are key in deter- mining model selection. Item-response probabilities refer to the likelihood that an individual in a given latent class will endorse a particular item response. They are used to confirm that individuals in each latent class have similar response patterns to the observed indicators and that class response pat- terns are distinct from each other. After selecting the best-fitting model, covariates are added to the model. Logistic regression coefficients are estimated by setting the beta parameter to 0 for the reference class; thus, providing an estimation of log-odds that indicate an endorsement of a covariate for a certain class relative to the reference class. Ethnicity, sex, and a proxy for socioeconomic status (maternal education) were included in the covariates analysis in addition to weight status, as each is strongly tied to disparities in obesity prevalence and substance use risk. Among adoles- cents, African Americans and Latinos have higher Lanza et al
  • 12. Am J Health Behav.™ 2014;38(5):708-716 711 DOI: http://dx.doi.org/10.5993/AJHB.38.5.8 overweight and obesity prevalence than Whites, and boys are more likely to be overweight or obese compared to girls.4 In young adulthood, men are more likely to use marijuana, cigarette smoking is more prevalent among Whites than African Ameri- cans, and Whites and Latinos report more binge drinking than African Americans.5 Generally, SES indicators like parental education and household income have shown that lower SES is associated with higher weight status,49 although associations with substance use are mixed.5 RESULTS Descriptive Data Table 1 compares the average rate of overweight/ obese adolescents’ substance use in young adult- hood to non-overweight/obese adolescents. Across all cigarette smoking indicators, overweight/obese adolescents had higher rates compared to non- overweight/obese adolescents. In contrast, over- weight/obese adolescents had lower rates of high- risk alcohol use compared to non-overweight/ obese adolescence. No significant differences were found between groups for marijuana use. Latent Class Analysis Model selection. LCA was conducted to identify latent classes of cigarette smoking, alcohol use, and marijuana use in young adulthood. Table 2 presents the statistical fit indices for 5 classes (the 6-class model did not converge). Model selection is
  • 13. generally based on a scree-like test, in which bet- ter fitting models are represented where the indices begin to level off.50 Although the 5-class model had the lowest values in fit criteria, indices began to level off significantly after the 3-class model; con- sequently, the 3-, 4-, and 5-class models were fur- ther explored before selecting a best-fitting model. Examination of parameter estimates identified the 4-class model as best-fitting the data in terms of classifying the underlying heterogeneity of ciga- rette, alcohol, and marijuana use in the sample. Class probabilities, homogeneity of item-response within classes, and distinct item-response patterns across classes were assessed to determine which model was most interpretable.43,46 The 3-class mod- el was able to identify a low and a high substance use class, but the third class lacked homogeneity. Two classes in the 5-class model lacked homogene- ity and there was a lack of distinctiveness between 2 classes. Figure 1 illustrates the item-response probabilities of each class of the 4-class model. Classes appear homogenous and distinct, and class sizes were found to be substantial as well. Identified classes. Considering item-response probabilities for each class (Figure 1), classes were identified based on endorsement of substance use behaviors. A little over one-third of the participants (34.7%) reported very low substance use behavior (Class 1; Low Substance Use). Of these, close to 80% stated that they had never smoked an en- tire cigarette, over 95% stated they had not been drunk or binged on alcohol, and almost 90% had never tried marijuana.
  • 14. Participants in the Regular Smokers class (Class 2; 12.4%) showed high endorsement of cigarette use, with 96% reporting having been a regular smoker at some point (at least 1 cigarette a day for Table 1 Cigarette, Alcohol, and Marijuana Use in Young Adulthood: Overweight/Obese vs. Non-overweight/Obese Adolescents Overweight/Obese Non-overweight/Obese Cigarette % Tried cigarette Smoked entire cigarette*** Smoked regularly*** Smoked past 30 days*** No. cigarettes per day (more than 1)*** 74 61 41 35 32 73 59 38 32 29 Alcohol % Drank since W1** Alcohol in past year (multiple times per month or week)*** Binge drink in past year (multiple times per month or week) * Binge drink in past 2 weeks* Drunk past year (multiple times per month or week*** Drunk driving***
  • 15. 76 40 20 31 16 21 78 46 22 33 19 24 Marijuana % Marijuana since W1 Marijuana past year No. of times used marijuana in past year(more than once) 44 31 18 45 32 17 *** p < .001; ** p < .01; * p < .05 Does Adolescent Weight Status Predict Problematic Substance Use Patterns? 712
  • 16. past 30 days) and all reporting smoking in the past 30 days. Over one-third (38%) smoked 2-9 ciga- rettes and just over half (52%) smoked 10 or more cigarettes on days smoked in the past 30 days. Similar to the Low Substance Use class, problem- atic alcohol use was very low. Also, although 40% had tried marijuana since the start of the study, only one-fourth had used marijuana in the past year. The High-risk Alcohol Use class (Class 3; 32.6%) was characterized by problematic alcohol use but less risky cigarette and marijuana use. Approxi- mately 70% stated they had used alcohol multi- ple times a month or week in the past year, about 80% indicated they had engaged in binge drinking or been drunk in the past year, and 50% stated they have binged in the last 2 weeks. Also, 35% reported drunk driving. In regards to cigarette and marijuana use, few had ever been regular smokers (16%), and almost none had smoked in the past 30 days. Although 39% reported using marijuana in the past year, less than one-fourth reported using more than once in the last year. Last, the High Substance Use class (Class 4; Table 2 Latent Class Model Fit Indices (N = 15,119) Classes Log Likelihood
  • 17. Free Parameters BIC Adjusted BIC AIC LMR LRT p- value for k-1 1 -174995.39 30 350279.49 350184.15 350050.78 N/A 2 -146775.79 61 294138.63 293944.78 293673.58 .000 3 -134435.31 92 269756.00 269463.63 269054.62 .000 4 -128469.95 123 258123.61 257732.72 257185.89 .000 5 -123837.44 154 249156.94 248667.54 247982.89 .000 Note. AIC = Akaike information criterion; BIC = Bayesian information criterion; LMR LRT = Lo-Mendell-Rubin likelihood ratio test. Figure 1 Substance Use Classes in Young Adulthood: Item-response Probabilities 0% 10% 20% 30% 40%
  • 21. l p as t y ea r B in g e d rin k p as t y ea r B in g e d rin k
  • 41. an a p as t … P r o b a b i l i t y Item 3-7 times wk/20+ Couple times mo or wk/10+ Once a mo/2-9 Yes/Once/Couple times yr No/None Class 1 Low Substance Use 34.7%
  • 42. Class 2 Regular Smokers 12.4% Class 3 High-risk Alcohol Use 32.6% Class 4 High Substance Use 20.2% Lanza et al Am J Health Behav.™ 2014;38(5):708-716 713 DOI: http://dx.doi.org/10.5993/AJHB.38.5.8 20.2%) represents participants with the highest levels of problematic substance use. Almost all (99%) reported to be regular smokers who smoked in the last 30 days, with over half smoking 10+ cigarettes on days smoked. Over 85% reported drinking multiple times per month or week in the past year, and the majority reported binge drinking and being drunk in the past year (93%) and binge drinking in the past 2 weeks (74%). Over half (55%) stated they had driven drunk. Two-thirds (69%) re-
  • 43. ported marijuana use in the last year, with 45% using more than once in that period. Predictors of class membership. Covariates were added to the LCA model to determine wheth- er adolescent weight status predicted particular substance use classes. A covariate model includ- ing weight status (overweight or obese), sex, race/ ethnicity (African American, Asian, Latino, White), and maternal education was estimated simultane- ously using latent multinomial logistic regression (Table 3). Using the Low Substance Use class as a reference class, adolescents meeting overweight or obesity status had a greater likelihood of being classified into the Regular Smokers class (β =.37, OR = 1.45, p < .001) than the Low Substance Use class. Similarly, overweight or obese adolescents were more likely to belong to the Regular Smokers class than the High Substance Use (β =.35, OR = 1.42, p < .001) and the High-risk Alcohol Use (β =.43, OR = 1.54, p < .001) classes. As for other individual characteristics (see Table 3 for statistical values), women were less likely to be classified into any problematic substance use class compared to the Low Substance Use class. African Americans, Asians, and Latinos were less likely to be classified into the High Substance Use or Regu- lar Smokers classes than the Low Substance Use class, and African Americans and Asians also were less likely to belong to the High-risk Alcohol Use class compared to the Low Substance Use class. On the other hand, Whites were more likely to be- long to the High-risk Alcohol Use class compared to the Low Substance Use class. Adolescents re-
  • 44. siding with mothers with higher education status were more likely to be classified into the High Sub- stance Use and High-risk Alcohol Use classes than the Low Substance Use Class, but were less likely to belong to the Regular Smokers class than the Low Substance Use class. The covariate analysis also was conducted with annual household in- come, with results unchanged. Annual household income was not included in the final model because a significant proportion of the sample (25%) did not have household income information, as this infor- mation was collected with parent-report at Wave 1. DISCUSSION Sole consideration of average group differences of substance use rates give an incomplete picture of the potential risks overweight or obese adoles- cents face in young adulthood. The average group differences shown in Table 1 suggest that cigarette smoking and alcohol use rates only vary slightly be- tween overweight/obese and non-overweight/obese groups. Statistical, but not clinically meaningful differences, may contribute to a false assumption that weight status is not an important predictor of substance use. However, with the utilization of Table 3 Estimated Odds Ratios (OR) of Class Membership in Relation to Obesity, Sex, Race/Ethnicity, and Education Indices ased on a Multinomial Latent Class Regression Model Reference class: Low Substance Use (Class 1)
  • 45. vs Regular Smokers (Class 2) vs High-risk Alcohol Use (Class 3) vs High Substance Use (Class 4) β(SE) OR(95%CI) β(SE) OR(95%CI) β(SE) OR(95%CI) Overweight/ obese vs non-overweight/obese .37(.07)*** 1.45(1.26-1.66) -.06(.05) .95(.85-1.04) .02(.06) 1.02(.91-1.15) Female vs Male -.20(.06)** .82(.73-.92) -.67(.05)*** .51(.46- .56) -.95 (.06)*** .39(.34-.44) African American vs. non-AA -1.23(.18)*** .29(.21-.42) -1.03(.15)*** .36(.27-.48) - 1.75 (.17)*** .17(.12-.24) Asian/Pacific Islander vs non-API -.96(.20)** .38(.26-.57) -.58(.16)*** .56(.41-.77) - .97(.18)*** .38(.27-.54) Latino vs non-Latino -1.19(.18)*** .31(.21-.43) -.11(.16) .90(.65-1.23) -1.08 (.17)*** .34(.24-.47) White vs non-White -.16(.17) .86(.61-1.19) .29(.15)* 1.34(1.003-1.79) .24(.16) 1.27(.93-1.74) Higher vs lower mother education .-.16(.03)*** .85(.80-.90) .20(.02)*** 1.22(1.17-1.27) .09(.02)*** 1.10(1.05-1.14) *** p < .001; ** p < .01; * p < .05 Does Adolescent Weight Status Predict Problematic Substance Use Patterns?
  • 46. 714 a person-centered approach, not only were unique patterns of substance use behavior in young adult- hood identified, but a more comprehensive assess- ment of adolescent weight status as a risk factor for problematic substance use was achieved. Ultimately, the key relationship between high- er weight status and problematic substance use points to regular cigarette smoking. Overweight or obese adolescents had a greater likelihood of belonging to the Regular Smokers class in young adulthood than any other class. On the other hand, overweight or obesity status in adolescence did not predict greater likelihood of belonging to the High-risk Alcohol Use of High Substance Use classes; consequently, higher weight status does not appear to be a risk factor for problematic al- cohol or marijuana use. Also, given that over- weight or obese adolescents did not have a lower likelihood of belonging to the Low Substance Use class vs problematic substance use classes, higher weight status does not appear to lower the likeli- hood of problematic substance use behavior. Although the current study clearly indicates that overweight or obese adolescents have a greater likelihood of being a regular smoker in the absence of problematic alcohol or marijuana use compared to non-overweight/obese adolescents, past longi- tudinal studies have reported mixed findings re- garding the role of higher weight status on ciga- rette smoking.35-38 Consideration of alcohol use and marijuana use alongside cigarette smoking, and assessment of cigarette smoking behaviors
  • 47. other than smoking initiation, which was a focus of previous studies, increases understanding of the relationship between weight status and cigarette smoking. One of the main questions arising from the current findings pertains to why higher weight status is related specifically to regular cigarette smoking but not other forms of problematic sub- stance use. Although there are many hypotheses linking higher weight status to cigarette smoking, to date, only a handful of studies present evidence on the potential pathways by which higher weight status in adolescence is linked to cigarette smok- ing. For instance, overweight and obese individu- als may initiate cigarette smoking because they perceive it as an effective weight loss strategy.51,52 Also, perception of being overweight or obese and focus on body size are related to smoking initia- tion, particularly among adolescent girls.37,53 In addition to social factors, biological ones also may inform the relationship between higher weight sta- tus and regular cigarette smoking. Food and drugs are known to activate the same neurological path- ways containing dopaminergic receptors linked to reward sites in the brain54,55 that may explain their co-occurrence. For instance, recent studies examining the pathway from cigarette smoking to obesity from adolescence to young adulthood sug- gest that decreased cigarette smoking is associ- ated with increased weight status.56,57 The negative relationship between decreased smoking and in- creased weight status suggest smoking and eating have similar neurophysiological response systems, as noted by other studies.58,59 For this reason, bi- directional relationships between weight status and cigarette smoking during the transition from
  • 48. adolescent to young adulthood should be explored more fully in future studies. Other findings from the current study revealed that ethnic and sex differences in substance use membership were generally in line with previous findings. Similar to prevalence rates reported in the National Survey on Drug Use and Health,5 re- sults showed that African-Americans, Asians, and Latinos were at lower risk of problematic cigarette, alcohol, and marijuana use, and males were at higher risk of belonging to problematic substance use classes. Future research should seek to as- sess whether ethnicity and/or sex moderates the relationship between higher weight status and sub- stance use, as this is yet unclear. Given that ethnic and sex disparities exist among substance use, as well as obesity status,4 these differences may influ- ence the degree to which risk behaviors are engaged in by overweight or obese adolescents from specific ethnic and/or sex groups. For instance, if the objec- tive to engage in regular cigarette smoking for over- weight or obese adolescents is to lose weight, this relationship may be stronger among white females than other groups, as they are most often subjected to social stigma and other negative social conse- quences resulting from higher weight status.60 Of course, several limitations need to be con- sidered. First, the current study relied on self- reported height and weight to measure BMI% for adolescents. Although measured BMI data is fa- vored over self-report, relatively minor differences in reliability between self-reported and measured BMI data have been reported in adolescence40,61 and numerous studies have successfully used
  • 49. ADD Health self-reported BMI data.62-64 Second, it is important to note that weight status was only accounted for at one point in time during adoles- cence. It is unknown whether adolescents meeting overweight or obesity status at Wave 1 met over- weight or obesity status across most or all years of adolescence. Similarly, we expect that some ado- lescents meeting overweight or obese status at dif- ferent points in time during adolescence were not accounted for in the analyses. BMI data are avail- able one year after Wave 1 (Wave 2) and 60% of participants meeting overweight or obesity status in Wave 1 also met overweight or obesity status in Wave 2. Third, the study was unable to examine socio-contextual and neighborhood variables that may inform how higher weight status contributes to cigarette smoking risk, such as low peer status or limited neighborhood resources for maintaining healthy weight. Fourth, the variation of age in the sample at each assessment point (eg, 18-26 years at Wave 3 increases the difficulty in interpreting findings as a result of developmental milestones, such as transition to college when high-risk alco- Lanza et al Am J Health Behav.™ 2014;38(5):708-716 715 DOI: http://dx.doi.org/10.5993/AJHB.38.5.8 hol use increases substantially. Acknowledging these limitations, the current study still has important implications for public health efforts aimed to mitigate health-risk behav-
  • 50. iors among young adults. Specifically, emphasis should be placed on decreasing the risk of ciga- rette smoking in overweight or obese adolescents. Although more research is needed to identify the processes by which adolescent weight status influ- ences cigarette smoking risk, physicians and other health professionals should address smoking risk with overweight or obese adolescents and probe for psychosocial or physiological stressors that may initiate high-risk smoking activity. Adolescents are exposed to many psychosocial stressors as they transition into young adulthood (eg, college, em- ployment, leaving home). Taking on the responsi- bilities of their own health behaviors may be too difficult for some adolescents already negotiating with significant developmental changes. Over- weight and obese adolescents may find themselves dealing with these types of stressors; on top of this they likely may be experiencing social exclusion and victimization. The culmination of risks may contribute to an overweight/obese adolescent’s de- cision to engage in regular smoking behavior as a weight management strategy and/or to decrease anxiety. They may be especially willing to engage in regular cigarette smoking if they believe smok- ing has similar effects on their physiological state as eating does (eg, feeling calm, pleasure). How- ever, without knowing the health service needs of overweight and obese adolescents, as well as other socio-contextual factors that largely influence obe- sity risk (physical activity resources, access to and knowledge of healthy nutrition), intervention ef- forts targeting smoking among overweight or obese youth will not be as effective. Empirical studies that can integrate multiple lines of research on obesity and substance use risk are warranted to
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  • 59. 60. Strauss RS, Pollack HA. Social marginalization of overweight children. Arch Pediatr Adolesc Med. 2003;157(8):746-752. 61. Field AE, Aneja P, Rosner B. The validity of self-reported weight change among adolescents and young adults. Obesity. 2007;15(9):2357-2364. 62. Harris KM, Perreira K M, Lee D. Obesity in the transi- tion to adulthood: predictions across race/ethnicity, im- migrant generation, and sex. Arch Pediatr Adolesc Med. 2009;163(11):1022-1028. 63. Merten MJ. Weight status continuity and change from adolescence to young adulthood: examining disease and health risk conditions. Obesity. 2010;18(7):1423-1428. 64. Tanner-Smith EE. Negotiating the early developing body: pubertal timing, body weight, and adolescent girls’ sub- stance use. J Youth Adolesc. 2010;39(12):1402-1416. Copyright of American Journal of Health Behavior is the property of PNG Publications and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. Lease Versus Purchase Paper Grading Guide
  • 60. FIN/370 Version 8 1 Learning Team: Lease Versus Purchase Paper Purpose of Assignment Students compare the factors involved in leasing versus purchasing capital assets. Resources Required Ch. 27 of Basic Finance Grading Guide Content 70 Percent Met Partially Met Not Met Comments: Discuss the factors involved in making a lease versus purchase decision. Discuss the application of time value of money concepts used in evaluating lease versus purchase decisions. The paper is no more than 350 words in length.
  • 61. Total Available Total Earned X #/X Writing Guidelines 30 Percent Met Partially Met Not Met Comments: The paper—including tables and graphs, headings, title page, and reference page—is consistent with APA formatting guidelines and meets course-level requirements. Intellectual property is recognized with in-text citations and a reference page. Paragraph and sentence transitions are present, logical, and maintain the flow throughout the paper.
  • 62. Sentences are complete, clear, and concise. Rules of grammar and usage are followed including spelling and punctuation. Total Available Total Earned X #/X Assignment Total # X #/5 Additional comments: Copyright © 2014 by University of Phoenix. All rights reserved. Intermediate-Term Debt and Leasing The previous chapter covered various short-term sources of
  • 63. finance, commercial bank loans, trade credit, commercial paper, secured loans, and factoring. Chapters 12 through 15 covered a variety of long-term, fixed-income securities ranging from straight bonds to convertible bonds and preferred stock. Between these extremes are intermediate-term bonds and leasing. Intermediate-term debt ranges from 5 to 10 years and is obtained through commercial banks and insurance companies. Term notes may also be sold to the general public. Some firms own properties in order to lease the properties to others. Washington Real Estate Trust owns office buildings, industrial centers, apartments, and shopping centers in the Washington, D.C., area and rents the space to stores such as Williams-Sonoma, Laura Ashley, and Giant Food. These retail establishments want the use of the asset but not ownership. They prefer to lease the space instead of buying and operating the buildings. The term of a lease may range from a short period such as a year or two to many years. Since leases create legal obligations (the lease payments), they are an alternative to short-, intermediate-, and long-term debt as a source of funds. This chapter describes the terms of a lease and illustrates the basic analysis of leasing versus borrowing and buying the asset. Since leases are an alternative to debt financing, this section also covers when lease obligations must be capitalized and placed on the firm’s balance sheet as a debt obligation. Intermediate-Term Debt While accountants classify all liabilities as either short-term (due in less than one year) or long-term (due in more than one year), debt can also be classified as short-term, intermediate- term, or long-term. Intermediate-term debt is outstanding for more than a year (and hence appears as long-term debt on the firm’s balance sheet), but it matures quicker than long-term debt. While long-term bonds may mature 20, 25, or 30 years after being issued, most intermediate-term debt will mature in 5 to 10 years. Intermediate-term debt issued by corporations and sold to the
  • 64. general public may be referred to as “notes” to differentiate it from the bonds of the corporation, which are long-term debt. For example, in July 2008, H. J. Heinz issued $500 million of 5.35 percent notes due in 2013 (5 years to maturity). Different terminology may be used when intermediate-term debt is obtained from a commercial bank or an insurance company. Such debt is often referred to as a term loan. Term loans are usually secured by equipment or real estate. Commercial banks, which make term loans of 1 to 5 years’ duration, generally require that the loan be secured by equipment. Insurance companies, which tend to make term loans of from 5 to 15 years, generally use real estate as collateral for the loan. In addition to the collateral, term loans have restrictive covenants that are negotiated between the debtor and the creditor. Common restrictions include a minimum current ratio such as 2.0:1, or a minimum amount of net working capital (that is, the difference between current assets and current liabilities must exceed some specified dollar amount). The creditors also require periodic financial statements from the borrower and may require prior approval before the debtor can issue additional debt. While these restrictive covenants are common in term loan agreements, they do not exhaust all the possibilities, as each loan is individually negotiated. Conditions in the credit markets and the relative strengths of the parties also affect the terms. Term loans are generally retired in periodic payments and hence are like mortgage loans. The repayment schedules call for the payment of interest and the retirement of the principal. For example, a firm buys equipment that costs $12,000 and has an expected life of 5 years. The firm arranges a term loan with a commercial bank. The following conditions apply: 1. a down payment of 20 percent of the cost of the equipment 2. five equal annual payments to pay the interest and retire the loan 3. a 9 percent interest rate on the declining balance 4. the loan to be secured by the equipment
  • 65. The first condition establishes the amount that the bank is willing to loan. Notice that the bank does not lend the entire amount; the borrower must put up $2,400 (0.20 × $12,000) and the bank finances the balance, $9,600. Terms 2 and 3 establish the rate of interest and the payment schedule. The fourth term designates the equipment as collateral against the loan and gives the bank the right to take the equipment and sell it should the debtor default. The repayment schedule is determined as follows. The borrower must make equal payments so that the bank earns 9 percent annually and the loan is retired in 5 years. This is another illustration of the time value of money. The equation necessary to solve this problem (that is, to determine the annual payments) is Calculator Solution Function Key Data Input PV = –9,600 FV = 0 I = 9 N =
  • 66. 5 PMT = ? Function Key Answer PMT = 2468.09 This is an example of an annuity, so the problem collapses to: PMT(PVAIF 9I, 5N) = $9,600 PMT(3.890) = $9,600 PMT = $9,600/3.890 = $2,467.87. Thus, $2,467.87 is the annual payment that retires this loan and pays 9 percent of the declining balance. The actual payment schedule and the division of the payment into interest payment and principal reduction are given in Exhibit 27.1. This table is essentially the same as the mortgage loan amortization schedule illustrated in Exhibit 7.2 (page 124) in Chapter 7. In both examples, the amount of the interest declines with each payment as the outstanding balance on the loan is reduced. Conversely, the amount of the principal repayment rises with each payment as the interest payment is reduced.
  • 67. Generally, the depreciation of the equipment and the resulting cash flow cover the required loan payments. In this case, the annual straight-line depreciation expense would be $2,400 ($12,000/5). The cash flow generated by this $2,400 noncash depreciation expense is approximately equal to the $2,467.87 payment required by the loan. (In many cases accelerated depreciation is used so that the initial depreciation expense is increased.) By matching the repayment schedule with the cash flow, the firm enhances its capacity to service the debt. Exhibit 27.1 Repayment Schedule for a $9,600 Term Loan at 9 Percent for Five Years Year Payment Interest Principal Retirement Balance Owed on Loan 1 $2,467.87 $864.00 $1,603.87 $7,996.13 2 2,467.87 719.65 1,748.22
  • 68. 6,247.91 3 2,467.87 562.31 1,905.56 4,342.35 4 2,467.87 390.81 2,077.06 2,265.29 5 2,467.87 203.87 2,264.00 1.29* *The $1.29 results from rounding off in using the interest tables. The $2,468.09 payment determined by the financial calculator avoids this error. Since each loan is individually negotiated between the borrower and the lender, a variety of possible terms exist. One possibility is for the lender to require equal principal repayments with interest being computed on the remaining balance for each period. The repayment schedule under these terms for the $9,600 term loan is presented in Exhibit 27.2. In this case, the
  • 69. principal is retired in five equal installments of $1,920 ($9,600/5 = $1,920 in the second column). The amount of interest (column 3) depends on the balance owed (column 4). Thus, the payment in the second year is the sum of the principal repayment ($1,920) plus the interest on the balance owed at the end of the first year ($691.20), for a total payment of $2,611.20 (column 5). Exhibit 27.2 Repayment Schedule for a $9,600 Term Loan at 9 Percent with Equal Principal Repayments Year Principal Repayment Interest Balance of Loan Total Payment 1 $1,920 $864.00 $7,680 $2,784.00 2 1,920 691.20 5,760 2,611.20 3
  • 70. 1,920 518.40 3,840 2,438.40 4 1,920 345.60 1,920 2,265.60 5 1,920 172.80 0 2,092.80 Other possible terms include no principal repayment until the loan is due at the end of the fifth year. In this case, the firm would annually remit the $864 interest payment, and at the end of the fifth year make the last interest payment plus the principal repayment ($864 + $9,600 = $10,464). The lender could combine the two previous illustrations and annually require a partial principal repayment (for example, $1,000 annually) with the balance of $4,600 ($9,600 – $5,000) paid at the end of the term of the loan. Such a lump repayment at the end of a loan is referred to as a balloon payment. Although firms obtain intermediate-term credit from banks and
  • 71. insurance companies, intermediate-term securities may be sold to the general public. Notes sold to the general public are not collateralized, while term loans usually are, and generally the notes do not have a compulsory repayment schedule. Such notes are really more similar to long-term bonds than to term loans. However, these notes may have specific features that make them attractive to investors. The intermediate term (for example, 7 years) may make these notes attractive to investors who do not want to make investments for a longer term (such as 20 years). In addition, intermediate-term notes frequently cannot be called and refunded before maturity. Since the notes lack a call feature, the investor knows that the firm cannot force the buyer to give up the security should interest rates fall. Many long- term bonds are called and refunded when long-term interest rates fall, so this noncallability of intermediate-term notes assures investors of their interest income (if no default) for the term of the notes. Leasing Leasing is essentially renting, and the two terms are often interchanged. Since lease contracts may cover any time period, lease financing may be an alternative to short- or long-term debt. A lease contract is for the use of an asset such as plant or equipment. Firms want the use of the asset. They use the capital budgeting techniques (net present value and internal rate of
  • 72. return) to determine which investments are profitable. After deciding which investments to make, they must decide how to finance the asset. Notice that it is the use of the asset that the firm desires and not necessarily title to the asset. Leasing permits the firm (lessee) to use the asset without acquiring title, which is retained by the owner (the lessor). In return, the lessee enters into a contract (thelease) to make specified payments for the use of the asset. Leases take one of two forms. An operating lease provides the lessee with the use of the asset and may include a maintenance contract. The cost of servicing the equipment is built into the lease. The contract may be canceled after proper notice if the lessee wants to change equipment. This type of lease is primarily used for renting equipment, cars, and trucks. The length of the lease is less than the expected life of the asset but the lease may be renewed. Since the lease is not for the life of the asset, the lessor anticipates either having the lease renewed or selling the asset at the lease’s expiration. A financial lease, which may also be referred to as a capital lease, differs from an operating lease in several significant ways. These contracts are not cancelable and do not include a service clause. The duration of a financial lease is the expected life of the asset. The lease payments cover the cost of the asset and earn a set return for the lessor. Thus, a financial lease is similar to debt financing. If the firm had issued bonds
  • 73. to obtain the funds to acquire the asset, the payments to the bondholders would cover the cost of the equipment plus their return (the rate of interest). Of course, if debt had been used, the firm would own the asset, while with leasing it does not acquire title. This difference is important if at the end of the asset’s life there is residual value that accrues to the asset’s owner. While there are two classes of leases, there are three types of lease agreements. From the viewpoint of the lessee, the type of lease agreement is immaterial; the firm still acquires the use of the asset. The type of lease has an impact only on the lessor. The first type of lease agreement is thedirect lease. The lessor owns the asset and directly leases it to the lessee. Direct leases are offered by manufacturers who build the asset, such as IBM, as well as by finance companies and leasing companies that acquire assets with the intent to lease them to prospective users. The second type of lease is a sale and leaseback. Under this type of agreement, the firm that owns the asset sells it to the lessor and then leases it back. The selling firm receives cash from the sale to the lessor that can be put to other uses but still retains the use of the asset. The lessee, however, relinquishes title to the asset and thus loses any residual value that the asset might have. And, of course, the firm must now make the lease payments. The third type of lease is a leveraged lease. Since the lessor
  • 74. owns the asset, that firm must have the funds to acquire it. In a leveraged lease the lessor borrows part of the funds necessary to acquire the asset. For example, a finance company may borrow from a commercial bank so that it may acquire an asset that it in turn leases to the ultimate users. If financial leverage is favorable, the lessor will increase the return on its funds invested in the asset. Lease or Purchase The question of whether it is better to buy or to lease depends on several crucial variables. These include the firm’s tax bracket, the terms of the lease, the asset’s anticipated residual value, and the cost of obtaining funds to buy the asset. While this introductory text cannot develop this topic, the following example will provide some of the essential information necessary to make the choice. A firm decides to acquire equipment that costs $5,000. The equipment has an expected life of five years, after which the equipment will be sold for an expected salvage value of $500. Depreciation will be straight-line. (The firm would use accelerated depreciation if possible, and the depreciation expense would start after six months have elapsed. These normal conditions are ignored to simplify the illustration.) Maintenance is expected to be $200 annually, and the firm’s tax rate is 40 percent. The purchase is financed entirely with a $5,000 loan that is retired through an annual $1,285 payment
  • 75. covering interest and principal (that is, the payments are a mortgage schedule). The annual cash outflows and inflows are shown in Exhibit 27.3. Initially, there is an immediate cash $5,000 outflow to pay for the equipment but that is covered by the loan, so there is no immediate cash outflow. At the end of the first year, there is a $200 cash outflow for maintenance, $450 for interest, and $835 for principal repayment, for a total of $1,485. Notice that the $1,000 depreciation is not a cash outflow because it is a noncash expense. Exhibit 27.3 Determination of Cash Outflows from Owning The outflows are partially offset by the tax savings that result from tax-deductible expenses. These expenses are the $200 maintenance, the $450 interest, and the $1,000 depreciation. Notice the principal repayment is not tax deductible. The sum of the tax deductible expense is $1,650, and since the tax rate is 40 percent, these expenses reduce income taxes by $660 so the net cash outflow is $825 ($1,485 – 660). Notice that the net cash outflow grows each year because the principal repayment increases and it is not a tax-deductible expense. At the end of the fifth year, the equipment is sold for $500. The sale is a cash inflow, but if an asset is sold for more than its book value, the cash inflow is reduced by the taxes generated by the sale. (If the asset were sold for less than its book value, the
  • 76. sale would reduce taxes.) In this illustration, the asset is completely depreciated, so its book value is $0. All of the sale is taxable income, so the firm nets only $300 after paying taxes of $200 on the $500 sale. Alternatively, the firm could lease the equipment from a lessor who wants a 10 percent return. To determine the annual lease payments, the lessor answers the following question: How much must I charge each year so that my $5,000 invested in the equipment yields 10 percent? (There is no reason to assume the interest rate lessee pays to borrow is the same rate the lessor wants to earn on the lease.) That is, The interest factor is 3.791, so the equation becomes PMT(3.791) = $1,319 PMT = $5,000/3.791 = $1,319. For the lessor to earn 10 percent, the annual lease payment should be $1,319. Calculator